Method and apparatus for multimedia broadcast multicast service

• US 9,042,223 B2
• Filed: 12/21/2012
• Issued: 05/26/2015
• Est. Priority Date: 12/21/2012
• Status: Active Grant

• Current Assignee: Motorola Solutions, Inc.
• Original Assignee: Motorola Solutions, Inc.
• Inventors: Korus, Michael F., Drozt, Peter M.
• Primary Examiner(s): Chung, Hoon J
• Application Number:
  US13/724,039
• Publication Number:
  US 20140177436A1
• Time in Patent Office: 886 Days
• Field of Search: 370/312, 370/390, 370/432
• US Class Current: 370/230
• CPC Class Codes: H04L 12/189 in combination with wireless systems selective distribution or broadcast in wireless communication networks H04W4/06
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 72/30 Resource management for broadcast services
• CPC Class Codes: H04W 76/40 for selective distribution or broadcast

Abstract

A method and apparatus for assigning Multimedia Broadcast Multicast Service (E-MBMS) bearers in at least two Multimedia Broadcast Single Frequency Network (MBSFN) areas in a 3GPP compliant wireless communication system is provided. An infrastructure device receives identifiers of a primary preferred MBSFN area and a secondary preferred MBSFN area from a User Equipment (UE). The infrastructure device assigns a first E-MBMS bearer in a first MBSFN and a second E-MBMS bearer in a second MBSFN, to support a call to the UE, the first and second E-MBMS bearers providing the same media transmission to the UE as part of a group call. The infrastructure device may receive an attribute parameter comprising a request for Make Before Break service or a request for a boost to coverage, from the UE.

Claims

1. A method of assigning Multimedia Broadcast Multicast Service (E-MBMS) bearers in at least two Multimedia Broadcast Single Frequency Network (MBSFN) areas in a Third Generation Partnership Project (3GPP) compliant wireless communication system, wherein the 3GPP compliant wireless communication system comprises a radio access network partitioned into a plurality of MBSFN areas, wherein each MBSFN area supports a plurality of E-MBMS bearers for transporting media streams to user equipments (UE), the method comprising:

receiving, at the application layer of an infrastructure device operably coupled to the 3GPP compliant wireless communication system, information from a UE, the information comprising an identifier that identifies a primary preferred MBSFN area that provides signals to the UE, and an identifier that identifies a secondary preferred MBSFN area that provides signals to the UE;

assigning, at the application layer of the infrastructure device, a first E-MBMS bearer in a first MBSFN area and a second E-MBMS bearer in a second MBSFN area, to support a call to the UE, the first and second E-MBMS bearers providing the same media content to the UE, wherein the first MBSFN area is one of the UE'"'"'s primary preferred MBSFN area and secondary preferred MBSFN area and the second MBSFN area is the other of the UE'"'"'s primary preferred MBSFN area and secondary preferred MBSFN area,

wherein the infrastructure device uses the information from the UE in the assignment and transmits the same media content to the UE on each of the first and second E-MBMS bearers.

2. The method of claim 1, further comprising the infrastructure device:

receiving an attribute parameter from the UE, the attribute parameter comprising a request for Make Before Break (MBB) service; and

assigning the first MBSFN area and the first E-MBMS bearer, and the second MBSFN area and the second E-MBMS bearer, also based on the attribute parameter.

3. The method of claim 1, further comprising the infrastructure device:

receiving an attribute parameter from the UE, the attribute parameter comprising a request for a boost to coverage; and

assigning the first MBSFN area and the first E-MBMS bearer, and the second MBSFN area and the second E-MBMS bearer, also based on the attribute parameter.

4. The method of claim 1, further comprising:

the first MBSFN area being the UE'"'"'s primary preferred MBSFN area, and the second MBSFN area being the UE'"'"'s secondary preferred MBSFN area.

5. The method of claim 1, further comprising:

the infrastructure device transmitting the same media content to the UE on each of the first and second E-MBMS bearers, with a time offset between the media content transmissions on each of the first and second E-MBMS bearers, whereby the UE can employ application layer time-diversity reception to received media content.

6. The method of claim 5, further comprising:

the infrastructure device transmitting the same media content to the UE on each of the first and second E-MBMS bearers, with a frequency offset between the time offset media content transmissions on each of the first and second E-MBMS bearers.

7. The method of claim 1, further comprising the infrastructure device:

receiving, from a second UE, an identifier of a primary preferred MBSFN area that provides signals to the second UE and an identifier of a secondary preferred MBSFN area that provides signals to the second UE;

determining which E-MBMS bearers and MBSFN areas to include in the call to a call group comprising the UE and the second UE, on the basis of;

the primary preferred MBSFN area that provides signals to the UE;

the secondary preferred MBSFN area that provides signals to the UE;

the primary preferred MBSFN area that provides signals to the second UE; and

the secondary preferred MBSFN area that provides signals to the second UE.

8. The method of claim 1, further comprising the infrastructure device:

assigning a different Temporary Mobile Group Identifier (TMGI) for the E-MBMS bearers in each of the first and second MBSFN areas.

9. The method of claim 1, further comprising the infrastructure device:

assigning the same Temporary Mobile Group Identifier (TMGI) for the E-MBMS bearers in each of the first and second MBSFN areas.

10. The method of claim 1, further comprising:

the infrastructure device assigning the first MBSFN area and the first E-MBMS bearer and the second MBSFN area and the second E-MBMS bearer also based on a current loading of MBSFN areas of the wireless communication system.

11. The method of claim 1, further comprising:

the infrastructure device, at the start of the call, notifying at least the second E-MBMS bearer used in the second MBSFN area to the UE.

12. The method of claim 1, further comprising:

the infrastructure device allocating a third E-MBMS bearer within the first or the second MBSFN area, to provide the media content to the UE, the first, second and third E-MBMS bearers providing the same media content to the UE, offset in time,

whereby the UE can employ application layer time-diversity reception to the received media content from the first and third E-MBMS bearers.

13. The method of claim 1, further comprising the infrastructure device:

receiving an indication of a priority level of a call; and

assigning the first MBSFN area and the first E-MBMS bearer, and the second MBSFN area and the second E-MBMS bearer, also based on the priority level of the call.

14. The method of claim 13, further comprising the infrastructure device:

when the priority level of the call indicates that the call is an emergency call, allocating a third E-MBMS bearer within the first MBSFN area or the second MBSFN area to provide the media content to the UE, the third E-MBMS bearer providing the same media content to the UE as the first and second E-MBMS bearers, offset in time.

15. A method for a User Equipment (UE) to provide Multimedia Broadcast/Multicast Service (E-MBMS) service area location update information to an infrastructure device in a Third Generation Partnership Project (3GPP) compliant wireless communication system, the 3GPP compliant wireless communication system having a radio access network partitioned into a plurality of Multimedia Broadcast Single Frequency Network (MBSFN) areas, wherein each MBSFN area provides an E-MBMS transmission and supports a plurality of E-MBMS bearers for transporting media content streams to UEs, the method comprising:

receiving, by the UE, transmissions from at least two MBSFN areas, each transmission comprising an MBSFN Area Identification (MBSFN Area ID) for a different MBSFN area;

choosing, by the UE, a primary preferred MBSFN area and at least one secondary preferred MBSFN area, and notifying the infrastructure device of the 3GPP compliant wireless communication system of the primary preferred MBSFN area and the at least one secondary preferred MBSFN area; and

when the UE receives a call provided to a call group comprising the UE, the UE receives the call on at least a first E-MBMS bearer transmitted in a first MBSFN area and a second E-MBMS bearer transmitted in a second MBSFN area, wherein the first MBSFN area is one of the UE'"'"'s primary preferred MBSFN area and at least one secondary preferred MBSFN area and the second MBSFN area is the other of the UE'"'"'s primary preferred MBSFN area and at least one secondary preferred MBSFN area,

wherein the first and second E-MBMS bearers provide the same media content to the UE.

16. The method of claim 15, further comprising the UE:

notifying the infrastructure device about a purpose attribute, the purpose attribute being selected in dependence on a current need of the UE for at least one of Make Before Break (MBB) service and a coverage boost.

17. The method of claim 15, further comprising the UE receiving the media content using different Temporary Mobile Group Identifiers (TMGI) on the first E-MBMS bearer and the second E-MBMS bearer.

18. The method of claim 15, further comprising:

the first MBSFN area being the UE'"'"'s primary preferred MBSFN area, and the second MBSFN area being the UE'"'"'s secondary preferred MBSFN area;

the UE using application layer time-diversity reception to process the received media content, the UE receiving the same media content via each of the first and second E-MBMS bearers with a time offset between the media content transmissions on each of the first and second E-MBMS bearers.

19. The method of claim 15, further comprising:

determining whether a level of a received signal from each of at least three MBSFN areas exceeds a first threshold and a second threshold, the second threshold being greater than the first threshold;

only considering a received signal if it exceeds the first threshold;

when none of the at least three signals exceeds the second threshold;

choosing a primary preferred MBSFN area, a secondary preferred MBSFN area and a ternary preferred MBSFN area; and

notifying the infrastructure device about the primary preferred MBSFN area, the secondary preferred MBSFN area and the ternary preferred MBSFN area;

when at least one of the at least three signals exceeds the second threshold;

choosing the highest of the signals as a default MBSFN area; and

notifying the infrastructure device about the default MBSFN area.